Radiator for hot-air furnaces



Oct. 15, 1929.

CI'A. BANGERT RADIATOR FOR HOT AIR FURNACES Filed 001;. 14, ,1927 ZSheets-Sheet 1 Oct. 15, 1929. c. A. BANGERT RADIATOR FOR HOT AIR FURNACES 2 Sheets-$heet 2 Filed 001;. 14, 1927 Zlmntoz Patented Dot. l5, M29

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trier:

CHARLES A. BANGJERT, @IE LONDUN, OPIO RADIATOR FOR HUT-AIR FURNACES:

Application filed. October 14, 1927. Serial No. $526,237.

, This invention relates to improvements in furnaces of the warm air heating type of steel or boiler plate construction having a riveted or welded body, and particularly to 5 the radiator therefor also of welded or riveted steel plate construction attached to the body at the smoke flue and dependingly extendingabout the rear portion of the body in spaced relation thereto.

The radiator as represented comprises a hollow steel drum of crescent outline in cross section with a correspondingly shaped tubular center therethrough providing an intermediate vertical air passage open at its opposite or upper and lower ends of the radiator, the walls of the tubular center being spaced from the outer side walls of the radiator-and at the opposite ends of its crescent having septum connections with the outer walls of the radiator to interiorly partition the radiator and provide a U-form of smoke flue.

It is therefore an object of the invention to provide a radiator for warm air furnaces of crescent form in cross section and interiorly partitioned into a Ll-form flue of vertical elongation having inlet and outlet opening. at relative opposite sides of the upper portion of the radiator and centrally thereof, and a vertical air passage centrally through the same, the up and down portions of the flue in divergent communication at the base of the radiator and at opposite sides of the air passage centrally separating the flue. producing an increased length of flue within the ra diator, and utilizing the heat ordinarily lost and conducted from the furnace by the smoke flue.

Another object of the invention is to provide a furnace radiator of steel plate construction simple and economical in production with increased smoke flue and heat radiating capacity and comprising a nested pair of tubular shells of crescent cross section h aving a horizontal plate connection at the top and bottom ends and laterally at the points of the crescents for a or length portion thereof, providing a lJ-form of flue about a central vertical air passage.

Further objects and features of the invention are more fully set forth in a description of the drawings, in which:

Figure 1 is a perspective view of the heater body front face plate with the feed and ash door, and the improved radiator connected to the rear of the body by a flue collar. The usual sheet metal casing incorporated with a furnace of this type, the ends of which are attached to the opposite edges of the face plate, is omitted.

Figure 2 is an enlarged perspective view of the improved radiator, with portions thereon broken away and in section to show the interior.

" Figure 3 is a central vertical section of the radiator. e

Referring to the drawing, 1 indicates the furnace body of sheet metal construction in which the [joints are riveted and bolted to gether, the riveting being for strength and the welding to make a permanent seal against escape of smoke, gas or fumes. i

The body has a forward projecting casing portion 2 to which the face plate 3, carry ing the feed and ash doors, is connected.

As the present invention is directed to the radiator for a steel furnace, the body structure is not described nordisclosed in detail as the same may follow any prevailing practice.

At the upper rear side of the body a flue opening is provided through which a flanged flue collar 5 is extended with the flange at one end of the collar bolted to the rear wall of the body, and the flange at the opposite end of the collar bolted to the sheet steel. radiator 6. The collar appropriately spaces the radiator from the body, and dependingly sup ports the same, the radiator providing a smoke flue surrounding a central air passage through the radiator. The joints of the steel plates making up the radiator are welded together so as to present an integral structure of hollow drum form with straight side walls, giving vertical elongation to the radiator, bringing its base along a line in proximity to the base of the tire chamber of the body.

The radiator in cross section is of crescent form to extend about a considerable area of the rear of the body, approximately terminating along lines tangent with the sides, with.

the forward wall 7 thereof following the con tour of the body so that vertically it is in parallel lines therewith. The crescent shape provides for increased area of the radiating surface for the radiator giving it greater width in. cross section towards the intermediate portion, adapting the same to be interiorly partitioned by a tubular center 8 which is welded or riveted at its upper end to the top plate 9 and at its lower end to the bottom plate 10, the top and bottom plates being in turn welded or riveted to the outer walls of the radiator.

' The tubular center provides an air passage through the radiator, increasing the radiating surface of the radiator, the air passing upwardly about and through the radiator, materially increasing the heating efliciency of the furnace by increasing the circulation.

The hollow crescent shape of the radiator will make the air circulate more rapidly as the heat is radiated from the sides and center, the center producing an upward draft 1ncreasing the circulation of air within the heating chamber of the furnace resulting in a more rapid circulation for the entire heating system. r

Vertical septum or partition plates 11-11 respectively, are welded or riveted along one vertical edge to one end of the tubular center I and at the opposite edge to the corrresponding end of the outer radiator wall, the connection being preferably at the central points of the crescent and the upper edge of the plates connect with the top plate 9. This divides the interior of the radiator into a U- form of flue with a down flue 12 at the forward side communicating with the combustion chamber of the" furnace body and at the lower end diverging about the tubular center intothe up flue 13 along the rearward side of the radiator, the upper'flue 13 leading to the outlet opening or flue thimble 14 fixed to the rear wall of the radiator and preferably centrally thereof. A cleanout snout 15 is provided for the radiator at the base thereof and preferably centrally of the rear wall.

The heated gases entering the radiator through the inlet flue 5 from the combustion chamber of the furnace are deflected downwardlyby the forward wall of the tubular center. This wall is concave and therefore receptive for high heating and confines the moving gases centrally longitudinally downward until they reach the base of the radiator where they are directed in diverging paths toward opposite ends of the radiator to pass into the up flue to the exit opening 14: of the convex rear wall of the tubular center. The concave forward wall and the convex rear wall of the tubular center expose an increased area to the flowing gases so as to absorb all the heat thereof for highly heating the air passing through the tubular center, the air passing from the radiator into the hot air chamber and distributing conductors ofthe furnace. The heat passing into the smoke flue, therefore, is not lost through the chimney as the smoke flue of the radiator is of extended length in its course through the radiator and spacious so as not to be retarding to the draft.

The radiator substantially comprises a pair of nested tubular shells of different cross sectional dimension and of similar outline spaced and joined by horizontal top and bottom plates welded or riveted together adapting the radiator to be easily and economically produced from sheet metal plates.

Having described my invention, I claim:

A radiator for warm air furnaces comprising a pair of nested tubular shells of approximate crescent shape cross section connected and spaced apart by top and bottom plates with the interior shell open at its upper and lower ends providing a central air passage through the radiator about a flue formed by the space between the shells and partition plates between the shells joining the shells at the opposite points of the crescent from the top thereof and to a point above the bottom providing alternate down and up flues about the central air passage connecting at the opposlte lower ends, the down flue being in the concave portion and the up flue in the convex portion of the shells.

In witness whereof, I hereunto subscribe my name.

CHARLES A. BANGERT. 

